Chemtrails (and HARPP) Theory, Info, Documentaries and Podcasts

The chemtrail conspiracy theory holds that some trails left by aircraft are actually chemical or biological agents deliberately sprayed at high altitudes for purposes undisclosed to the general public in clandestine programs directed by government officials.

This theory is not accepted by the scientific community, which states that they are just normal contrails, and that there is no scientific evidence supporting the chemtrail theory.

Do you know when an airplane leaves white lines or trails behind them... do you know what the difference is between: "Chem-Trails" (chemical trails behind an airplane) and "Con-trails" (condensation trails behind an airplane)?